c++

#include<iostream>
using namespace std;
int main(){
    int n,s1=0,s2=0,i=1;
    while(i<=12){
        cin>>n;
        s1+=300;
        s1-=n;
        if(s1<0){
            cout<<-1*(i);
            return 0;
        }
        else {
            s2+=s1/100;
            s1%=100;
        }
            i+=1;
        
            
            
    }
    cout<<s1+s2*120;
    
    
}